On a 1995 S-10 Blazer?

Question

On a 1995 S-10 Blazer with a 4.3 Vortec I have a bad mis fire probably on 2 or more cylinders. The reader reads code 12 which is the distributer is not communicating with the ECM (electronic control module) what is the problem

Answer 1

Just a guess, but I'd say the distributor is not communicating with the ECM.

Ignition control modules are fairly inexpensive.
But I'd take it to someone that can do a computer diagnostic. Not just scan codes.

By the way, code 12 means no faults noted.

Answer 2

actually code 12 is a check code is normal code to find in a perfectly fine running auto. is this a tbi motor vin z 8th digit or a vin w? vin w are famed for leaks in the injector or fuel lines under intake. another thing have you checked the plugs to see if they are firing?? a cracked distributor shaft, bad wires, bad plugs could be many different things. I recomend check cap rotor distributor shaft ( the magnet under the rotor) for cracks. where I would start

Answer 3

12 is normal code indicating no crank signal, I'd get a complete tuneup (wires,cap, rotor too) first with delco parts, and go from there. You may have an egr prob.

Answer 4

I had a similar problem on a 1992 . It cost me close to $1 000 in shop charges. For nothing . They said put a match to it. Honest. DUMP IT.

Answer 5

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